Plate rack



FIG. 1 is a perspective view of a plate rack showing our new design;

FIG. 2 is a right side elevational view thereof, with a left side elevational view being a mirror image thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The portions shown in broken lines in FIGS. 1-6 form no part of the claimed design. 

The ornamental design for a plate rack, as shown and described. 